Switch frame, method of transmitting the switch frame and a quality indicator channel structure including the switch frame

• US 20030206541A1
• Filed: 05/01/2003
• Published: 11/06/2003
• Est. Priority Date: 05/03/2002
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Ki Jun, Yun, Young Woo, Kwon, Soon Yil, You, Cheol Woo
• Granted Patent: US 7,499,430 B2
• Time in Patent Office: Days
• US Class Current: 370/337
• CPC Class Codes: H04B 7/2653 for logical channel control
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0007 by modifying the frame length
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/0073 Special arrangements for feedback channel
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 36/302 due to low signal strength

Abstract

Disclosed are a switch frame, a method of transmitting the same at a mobile station, and a quality indicator channel structure including the same. The frame for switching a cell/sector has at least one first slot at a beginning portion of the frame, the at least one first slot having a channel quality indicating information, and at least one second slot at an end portion of the frame, the at least one second slot having cell/sector switching information.

Claims

1. A frame for switching a cell/sector, comprising:

at least one first slot at a beginning portion of the frame, the at least one first slot having a channel quality indicating information; and

at least one second slot at an end portion of the frame, the at least one second slot having cell/sector switching information.

2. The frame of claim 1, the frame further comprising:

at least one third slot between the at least one first slot and the at least one second slot, the at least one third slot having differential information of the channel quality indicating information with a serving cell/sector cover.

3. The frame of claim 2, wherein a length of the at least one third slot is determined depending on a length of the at least one second slot.

4. The frame of claim 1, wherein a length of the at least one second slot is determined by multiplying Ns by n where Ns is a slot repetition factor of the cell/sector switching information and n is a slot repetition factor of the channel quality indicating information.

5. The frame of claim 1, wherein the channel quality indicating information includes a carrier-to interference ratio.

6. The frame of claim 1, wherein a length of the frame is 20 ms.

7. The frame of claim 1, wherein a length of each slot is 1.25 ms.

8. The frame of claim 1, wherein the cell/sector switching information is any one of a specific constant and differential information of the channel quality information with a target cell/sector cover.

9. The frame of claim 1, wherein a transmission power of the at least one second slot is identical to that of the at least one first slot.

10. The frame of claim 1, the at least one second slot starts from Kth slot of the frame where K is a positive integer value determined by subtracting (Ns*n)+1 from a number of slots of the frame, wherein Ns being a slot repetition factor of the cell/sector switching information and n being a slot repetition factor of channel quality indicating information.

11. A method of transmitting a switch frame in a cell/sector at a mobile station, comprising:

transmitting channel quality information using at least one slot at a beginning portion of the switch frame; and

transmitting cell/sector switching information using at least one slot at an end portion of the switch frame.

12. The method of claim 11, wherein the cell/sector switching information is any one of a constant and differential information of the channel quality information with a target cell/sector cover.

13. The method of claim 11, further comprising a step of transmitting differential information of the channel quality information with a serving cell/sector cover.

14. The method of claim 13, wherein a length of the differential information is determined depending on a length of the cell/sector switching information.

15. A switch frame, comprising:

a first portion including channel quality information of a serving cell/sector at a beginning portion of the switch frame;

a second portion including cell/sector switching information at an end portion of the switch frame; and

a third portion including differential information of the channel quality information between the first portion and the second portion, wherein a length of the third portion depends on a length of the second portion.

16. The switch frame of claim 15, wherein the length of the second portion is determined by multiplying Ns by n where Ns is a slot repetition of the switching information and n is a repetition factor of the channel quality information.

17. The switch frame of claim 16, wherein the cell/sector switching information is obtained by repeating Ns*n times differential information of the channel quality information with a target cell/sector cover on slots of the second portion, wherein the differential information with the target cell/sector cover being estimated in a first slot of the second portion.

18. The switch frame of claim 16, wherein the cell/sector switching information is obtained by repeating Ns*n times differential information of the channel quality information with a target cell/sector cover on a first gated-on slot of the second portion, wherein the differential information with the target cell/sector cover being estimated on a gated-on slot of the second portion.

19. The switch frame of claim 16, wherein the cell/sector switching information is obtained by repeating Ns*n times a specific constant to a target cell/sector on slots of the second portion, wherein the specific constant being in a first slot of the second portion.

20. The switch frame of claim 16, wherein a transmission power of the second portion is identical to a transmission power of the channel quality information of the first portion.

21. A quality indicator channel for mobile communication including at least one switch frame, the switch frame, comprising:

a first portion including a channel quality information of a serving cell/sector at a beginning portion of the switch frame;

a second portion including cell/sector switching information at an end portion of the switch frame; and

a third portion including differential information of the channel quality information between the first portion and the second portion,

wherein a length of the third portion depends on a length of the second portion.

22. The switch frame of claim 21, wherein the length of the second portion is determined by multiplying Ns by n where Ns is a slot repetition of the switching information and n is a repetition factor of the channel quality information.